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Slow or erratic
movement of
Cylinders (Noisy
operation of
cylinders)
Low hydraulic fluid level.
Check and replenish hydraulic fluid
Cold hydraulic fluid
Allow hydraulic system to warm up to operating
temperature
Hydraulic Oil viscosity too heavy or
Incorrect oil
Check oil number and viscosity, Refill correct
hydraulic oil
Engine R.P.M. too slow (hydraulic
pump R.P.M. too slow)
Increase engine speed to obtain satisfactory
backhoe operation
Excessive weight in bucket.
Material weight exceeds maximum
specified backhoe capacity
Reduce material load. (Digging load)
Control valve linkage
binding/defective
Check control valve linkage and repair if
worn/defective.
Aeration of hydraulic fluid
Refer to "Aeration of Hydraulic Fluid"
Quick disconnect coupler
restriction or coupler "Flow checks"
Check coupler connections. Repair or replace
Hydraulic hose or tube line
restriction (hoses/tube line) kinked
or pinched
Check hoses and tube lines for evidence of
restriction
Boom, Dipperstick or Bucket
cylinder piston assembly leakage
Check cylinders for leakage. Repair as needed
Relief valve erratic or set below
specifications
Check and reset relief valve. Setting as needed.
Control valve leaking
internally.(hypassing fluid
within valve).
Replace control valve and recheck operation.
Inadequate
lifting capacity
Engine R.P.M. too slow.
Increase engine R.P.M
Excessive load. Material loading
exceeds specified backhoe
capacity
Reduce Load
Relief valve setting below
specifications
Check and reset relief valve setting as needed.
Bucket, Boom and Dipperstick cylinder
piston assembly leakage
Check cylinders for leakage. Repair as needed
Control valve leaking internally
Replace control valve and recheck operation
Hydraulic pump defective
Refer to "Hydraulic Pump Capacity Inadequate".
Aeration of Hydraulic
Fluid(Generally
indicated by foamy
appearance of fluid)
Low hydraulic fluid level
Check and refill hydraulic system to proper
level.
Air leaking into suction side of
hydraulic pump.
Check for loose or defective connections
between reservoir and hydraulic pump
Hydraulic fluid foaming due to
improper hydraulic oil usage
Refer to Tractor Operator's Manual and replace
hydraulic oil using recommended hydraulic oil.
